"The teams fight in teams of 5vs5, and 16vs16, where, as it was in medieval times, the object is to knock the opposing team to the floor. A new category of 10vs10 will be introduced in Poland in 2015.
There is also 1vs1 dueling category, that like the sport of fencing is scored by the number of hits made, in this case in a 2 minute periods. Unlike Fencing the fighters do not stop each time a point is scored.
The fighters can choose to excel in two-handed sword, sword and shield or two handed pole weapon."
Here's the USA team at last year's World Championship, starting at about 3 minutes into the video.